diff --git a/esercitazioni/0_se_multiplo.cpp b/esercitazioni/5_0_se_multiplo.cpp
similarity index 100%
rename from esercitazioni/0_se_multiplo.cpp
rename to esercitazioni/5_0_se_multiplo.cpp
diff --git a/esercitazioni/5_0_se_neg_1_se_pos.cpp b/esercitazioni/5_0_se_neg_1_se_pos.cpp
new file mode 100644
index 0000000..7ce22d1
--- /dev/null
+++ b/esercitazioni/5_0_se_neg_1_se_pos.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+#include <cstdio>
+
+using namespace std;
+
+int main() {
+	int a;
+	cout << "Inserisci numero intero: ";
+	cin >> a;
+	cout << (a/abs(a)+1)/2 << endl;
+	return 0;
+}
diff --git a/esercitazioni/1_se_pos-1_se_neg.cpp b/esercitazioni/5_1_se_pos-1_se_neg.cpp
similarity index 100%
rename from esercitazioni/1_se_pos-1_se_neg.cpp
rename to esercitazioni/5_1_se_pos-1_se_neg.cpp
diff --git a/esercitazioni/a.out b/esercitazioni/a.out
index 16b0c05..bf9f45c 100755
Binary files a/esercitazioni/a.out and b/esercitazioni/a.out differ